The effect of severe plastic deformation on precipitation in supersaturated Al-Zn-Mg alloys

J. Gubicza, I. Schiller, N. Q. Chinh, J. Illy, Z. Horita, T. G. Langdon

研究成果: Contribution to journalArticle査読

152 被引用数 (Scopus)

抄録

Experiments were conducted to examine the influence of equal-channel angular pressing (ECAP) on the development of precipitation microstructures in two supersaturated Al-Zn-Mg alloys. The results show that ECAP leads to an ultrafine grain size with finely dispersed η precipitates. It is concluded that processing by ECAP promotes the precipitation processes because dislocations act as nucleation sites for precipitates. Spherical precipitates were observed in the alloys processed by ECAP whereas long rod-like precipitates were also observed after ageing without ECAP. Calculations show the yield strengths estimated from the characteristic parameters of the precipitation microstructure are in good agreement with the values determined by mechanical testing.

本文言語英語
ページ(範囲)77-85
ページ数9
ジャーナルMaterials Science and Engineering A
460-461
DOI
出版ステータス出版済み - 7 15 2007

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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